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Honeycomb structure

a honeycomb and structure technology, applied in the field of honeycomb structure, can solve the problems of shifting difficulty in acquiring the isostatic strength of the honeycomb structure, and damage to the honeycomb structure, and achieve excellent thermal shock resistance, effective inhibiting the shift of the honeycomb structure, and excellent thermal shock resistance

Active Publication Date: 2017-11-16
NGK INSULATORS LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The present invention relates to a honeycomb structure that can be used as a filter, catalyst carrier, and the like. The honeycomb structure is formed with a high degree of thermal shock resistance, which results in low pressure loss and a small heat capacity. This allows for faster activation of the catalyst. The honeycomb structure also has a high porosity of the partition walls, which decreases the holding pressure required for the structure. The honeycomb structure includes a porous supporting bulge that inhibits movement of the honeycomb structure body in a cell extending direction, without the need for a high holding pressure.

Problems solved by technology

However, when the thickness of the partition walls of the honeycomb structure is decreased or the porosity of the substrate is increased, it becomes difficult to acquire an isostatic strength of the honeycomb structure.
When the isostatic strength of the honeycomb structure is low, the honeycomb structure might be damaged by a holding pressure applied to a circumference of the honeycomb structure at the time of receiving the honeycomb structure in the can member.
When the holding pressure is decreased to avoid the damages on the honeycomb structure, there is the problem that the honeycomb structure shifts from a predetermined received position in circumstances where an exhaust gas pressure or vibration is applied to the honeycomb structure.

Method used

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Examples

Experimental program
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Effect test

example 1

[0085](Honeycomb Structure)

[0086]To 100 parts by mass of a cordierite forming raw material, there were added 13 parts by mass of a pore former, 35 parts by mass of a dispersing medium, 6 parts by mass of an organic binder and 0.5 part by mass of a dispersing agent, respectively, followed by mixing and kneading, to prepare a kneaded material. As the cordierite forming raw material, alumina, aluminum hydroxide, kaolin, talc and silica were used. Water was used as the dispersing medium, cokes having an average particle diameter of 1 to 10 μm were used as the pore former, hydroxypropyl methylcellulose was used as the organic binder, and ethylene glycol was used as the dispersing agent. Particle diameters and an amount of the pore former were controlled to control pore diameters and a porosity of partition walls.

[0087]Next, the kneaded material was extruded by using a predetermined die, to obtain a honeycomb formed body in which a honeycomb precursor having a quadrangular cell shape and ...

examples 2 to 9

[0105]In Examples 2 to 7, the procedure of Example 1 was repeated except that a thickness (mm) of partition walls, a porosity (%) and an average pore diameter (μm) were changed as shown in Table 1, to prepare honeycomb structures. On the other hand, in Examples 8 and 9, the procedure of Example 1 was repeated except that a length of each honeycomb structure and a length of each supporting bulge were changed, to prepare honeycomb structures. In Example 8, the length of the honeycomb structure was set to 152 mm and the length of the supporting bulge was set to 2 mm. In the honeycomb structure of Example 8, a value of “S2 / (S1+S2)” was 0.01. In Example 9, the length of the honeycomb structure was set to 91 mm and a length of a supporting bulge was set to 75 mm. In the honeycomb structure of Example 9, a value of “S2 / (S1+S2)” was 0.8.

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Abstract

A honeycomb structure includes a pillar-shaped honeycomb structure body including porous partition walls defining and forming a plurality of cells which extend from an inflow end face to an outflow end face, and a porous outer wall surrounding the partition walls, a porous supporting bulge disposed to extend out from a circumference of the outer wall so that at least a part of the outer wall is exposed, and plugging portions arranged in open ends of the cells, and the supporting bulge has support portions and a side wall portion, and the partition walls and the outer wall of the honeycomb structure body and the support portions and the side wall portion of the supporting bulge are all formed monolithically by formation of a ceramic raw material.

Description

TECHNICAL FIELD[0001]The present invention relates to a honeycomb structure, and more particularly, it relates to a honeycomb structure which is easily manufactured to be excellent in thermal shock resistance, and is prevented from being shifted in a can member when the honeycomb structure is received in the can member which receives the honeycomb structure.BACKGROUND ART[0002]Honeycomb structures have broadly been used in filters, catalyst carriers and the like, and have especially broadly been used as exhaust gas purifying and exhaust gas treating catalyst carriers, filters and the like in internal combustion engines such as a gasoline engine and a diesel engine, and burning devices.[0003]Especially, the honeycomb structure for use as the exhaust gas purifying catalyst carrier or filter or the like in a gasoline engine car, a diesel engine car or the like is required to have an improved purification performance to cope with exhaust gas regulations which are yearly strengthened in ...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): B01J35/04B01D39/20F01N3/022B01D46/24B01D53/94B01J23/745C04B38/06C04B38/00C04B35/195B01J37/08B01J37/00F01N3/28
CPCB01J35/04B01D39/20B01D46/247B01D46/2474B01D53/94C04B35/195B01J37/0009B01J37/08B01J37/0018C04B38/0695C04B38/0012B01J23/745F01N3/0222F01N3/2842B01D2046/2437B01D2046/2481B01D2279/30C04B2235/606C04B2235/6021C04B38/00C04B38/06F01N3/28F01N2330/10F01N2330/30F01N2330/60C04B2235/3217C04B2235/3218C04B2235/3418C04B2235/3445C04B2235/349C04B2235/5292C04B38/0006C04B2111/00793C04B2111/0081C04B2111/2084B01D46/249B01D46/24492B01D46/24491B01D46/2484B01D46/2476B01D46/2482B01D46/2492B01J35/56B01J35/60C04B38/0051F01N3/022F01N3/2803B01D46/2496B01D46/2425B01D46/2429B01D46/2488B01D46/2494B01D46/2486
Inventor AOKI, TAKASHIWAKIDA, NORIHIROHATAKEYAMA, YOSHIAKI
Owner NGK INSULATORS LTD
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